fix: Fixed variable name

[plasticbox]

No description provided.

[codecov]

Codecov Report

Attention: Patch coverage is 0% with 3 lines in your changes are missing coverage. Please review.

Project coverage is 71.37%. Comparing base (e6030a7) to head (84af537).

Files	Patch %	Lines
tower-sessions-core/src/session_store.rs	0.00%	3 Missing ⚠️

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #167   +/-   ##
=======================================
  Coverage   71.37%   71.37%           
=======================================
  Files           5        5           
  Lines         283      283           
=======================================
  Hits          202      202           
  Misses         81       81           

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[maxcountryman]

Thanks for this!